Holy Water is a Sacramental that remits venial sin. Because of the blessing attached to it, Holy Church strongly urges its use upon children, especially when dangers threaten, such as fire, storms, sickness and other calamities. EVERY CATHOLIC HOME SHOULD ALWAYS HAVE IN IT A SUPPLY OF HOLY WATER.
Untold spiritual wealth is concentrated in a tiny drop of blessed water. And we give it so little thought! Did we realize now, as we shall realize after death, the many benefits which may be derived from Holy Water, we would use it far more frequently, and with greater faith and reverence. Holy Water has its great power and efficacy from the prayers of the Church, which its Divine Founder always accepts with complacency.
HERE ARE SOME OF THE PETITIONS THE PRIEST MAKES TO GOD WHEN HE BLESSES THE WATER.
"O God,....grant that this creature of Thine (water) may be endowed with divine grace to drive away devils and to cast out diseases, that whatever in the houses or possessions of the faithful may be sprinkled by this water, may be freed from everything unclean, and delivered from what is hurtful...Let everything that threatens the safety or peace of the dwellers therein be banished by the sprinkling of this water, so that the health which they seek, by calling upon Thy Holy Name may be guarded from all assault."
These prayers ascend to heaven each time you take Holy Water and sprinkle a drop either for yourself or another, whether he be present or absent; and God's blessings descend on soul and body.
The devil hates Holy Water because of its power over him. He cannot for long abide in a place or near a person that is often sprinkled with this blessed water. Holy Water, sprinkled with faith and piety, can move the Sacred Heart to bless your loved ones and protect them from all harm of soul and body. Why worry and fear, hasten to your Holy Water font and give your dear ones the benefit of the Church's prayers.
Only in Purgatory can one understand how ardently a poor soul longs for Holy Water. If we desire to make a host of intercessors for ourselves, let us try to realize now some of their yearnings, and never forget them at the Holy Water font. The souls nearest to heaven may need the sprinkling of only a drop to relieve their pining souls.
Because Holy Water is one of the Church's sacramentals, it remits venial sin. Keep your soul beautiful in God's sight by making the Sign of the Cross carefully while saying, "BY THIS HOLY WATER AND BY THY PRECIOUS BLOOD WASH AWAY ALL MY SINS, O LORD."
Everyone of us has someone, (whether in our immediate family or friends), who is in danger of losing his soul. Parents, use this Holy Water for your children who may have gone astray. Some through alcohol or drugs, having left the Church, through living a life style in contrast to the teachings of the Church, or divorced and remarried outside the Church. Use the means of the prayers of the Church which are attached to Holy Water, and God in His mercy will hear your prayers.
Source: Fr. T. Harris.