Hope: Hope is the second of the theological virtues. Faith (the first theological virtue) tells us that God is infinitely good and infinitely powerful. Hope is the virtue by which, with firm confidence in God's power and goodness, we expect eternal life and the means to obtain it. 
      Charity: The third and greatest of the theological virtues is charity, or the love of God. Without charity, as St. Paul tells us, everything else is of no value: "If I speak with the tongues of men and angels and have not charity, I am become as  sounding brass or a tinkling cymbal.......And if I should distribute all my goods to feed the poor, and if I deliver my body to be burned, and have not charity, it profiteth me nothing." (1 Cor. 13:1-3.) The Apostle tells us that in so far as the supernatural is concerned, to perform the greatest acts of kindness towards our fellow men is useless; to make even the sacrifice of one's life is useless; unless we are actuated by the love of God for which we are created. Charity towards our neighbor must be founded on the love of God.
      If there is no God, there is no reason why the stronger man should not dominate the weaker, and enslave him, just as he constrains the lower animal to serve him. The only true charity is that which is founded in the love of God. That is why Christian charity has revolutionized and transformed the world. By charity we love God for His own sake, and our neighbor as ourselves for the love of God. Sins against Faith, Hope and Charity are: Infidelity, idolatry, superstition, heresy, apostasy, despair, presumption, blasphemy and sacrilege.
      Idolatry: Idolatry is adoring a false God The nations that have turned away from Christ do not bow down, like their pagan ancestors, before stocks and stone; but they have set up their new idols. Christ Himself warns us: "Beware of false prophets, who come to you in the clothing of sheep, but inwardly they are ravening wolves, By their fruits you shall know them." (Matt. 7:15-16.)  The modern world has not been wanting in false prophets, and in idols set up for adoration of its dupes and slaves. The Nazis, the Brown Fascists, set up for adoration an impersonal thing, the idol which they called the Super-race. To this Moloch, the rest of mankind, and even their own weaker brothers, were to be offered in sacrifice; while they themselves of course, were to be the Super-men. The rest of the world, however, asserted its rights; and we lived to see the proud and brutal Nazis, with their idol, "lick the dust." The remarkable thing is that, for a time there were millions of dupes ready to believe the Nazi prophets, who told them that Hitler was a greater man than Christ.
      The Communists, the Red Fascists, set up another Moloch, the Totalitarian State, to take the place of God, and again we saw millions of individuals like cogs in a machine; all their personal liberties sacrificed to a monstrous impersonal idol; themselves driven, like animals, by tyrants whom they had enthroned in the place of religion and of God. Others again have bowed down before the idol of Science and put it in the place of God. But Science, divorced from religion, instead of bringing it to perfection, has threatened to blow their civilization out of existence.  Still more make idols of the objects of their passions, e.g. when a man idolizes a woman so much that he gives up his religion and marries outside the Church.
      These are some of the idols of the modern world, and such are their fruits:
Superstition: Black Magic which seeks to have dealings with evil spirits, and Spiritualism which tries to contact the spirits of the dead, are alike forbidden by the Bible and the Church. In many cases the things manifested by them are mere fakes and deceptions. When they are not deceptions, they are extremely dangerous; as evil spirits may inflict serious mental, and even bodily harm on those who voluntarily hand themselves over to their control. Heresy: Heresy is rejecting any particular teaching of the Church. Apostasy: Apostasy is a rejection of all the teachings of the Church. These are all mortal sins when committed with full deliberation. We sin against Faith by not taking sufficient care to acquire necessary instruction and knowledge of our Faith. We sin against Faith by taking part in the services of any false religion. We can also sin against Faith by exposing it to danger in such ways as by reading bad books, watching bad movies etc. Sins against Hope are despair and presumption. There is no sin, no matter how enormous or how shameful, that God will not pardon if we repent. Therefore despair is a grievous sin against God's mercy. Judas sinned when he betrayed his Master. He sinned still more deeply when he despaired of his Master's forgiveness. Presumption, on the other hand is the sin of expecting to save one's soul without using the necessary means to save it, e.g. a man putting off receiving the Sacraments of Penance and the Blessed Eucharist until he is dying.
      We sin against charity by refusing to God the honor, love and worship that is His due by sacrifice and prayer. Hence those who habitually miss Mass on Sunday, sin against the First Commandment as well as the Third Commandment. Sacrilege is another sin against the First Commandment. it is the violation or irreverent treatment of a sacred person, place or thing. It can be mortal or venial according to the nature of the matter. The First Commandment does not forbid the making if images, it forbids the making of images to adore and serve them, which is idolatry. If the making of images was forbidden, it would be sinful to have our photographs taken. If the making of images for sacred purposes was forbidden, God would not have ordered the Jews to place two cherubim of beaten gold in the Tabernacle. (Exodus 15:18.)
      Sacred images remind us of Christ and His saints; just as photographs in the home remind us of our dear ones living and dead. Sacred images inspire our devotion, and help us to raise our minds to God, Our Lady, and the Saints in Heaven; and so they assist us to pray. This custom of using images to inspire devotion has been in use from the earliest centuries, as we see from the images carved by the early Christians in the catacombs. Some Protestants in their anxiety to accuse Catholics of idolatry, make a Second Commandment out of the words: "Thou shalt not make to thyself any graven thing. Thou shalt not adore nor serve them." This upsets the order of the Commandments, and as there are only ten, they are forced to combine the last two, to prevent having eleven.

 Source: Rev. W. Frean, C.SS.R. Commentary on the Catechism.