Why do catholics belive in Guardian angels?
From the Catechism:
336
From its beginning until death, human life is surrounded by their watchful care and intercession.202 "Beside each believer stands an angel as protector and shepherd leading him to life."203 Already here on earth the Christian life shares by faith in the blessed company of angels and men united in God.
Footnote 202 refers to Mt 18:10; Lk 16:22; Ps 34:7; 91:10-13; Job 33:23-24; Zech 1:12; Tob 12:12.
Mt 18:10: “See that you do not despise one of these little ones, for I say to you that their angels in heaven always look upon the face of my heavenly Father.”
Lk 16:22: When the poor man died, he was carried away by angels to the bosom of Abraham. The rich man also died and was buried…
Ps 34:7: The angel of the LORD, who encamps with them, delivers all who fear God.
Ps 91:10-13:For God commands the angels to guard you in all your ways. With their hands they shall support you, lest you strike your foot against a stone. You shall tread upon the asp and the viper, trample the lion and the dragon.
Job 33:23-24: If then there be for him an angel, one out of a thousand, a mediator, To show him what is right for him and bring the man back to justice,
He will take pity on him and say, “Deliver him from going down to the pit; I have found him a ransom.”
Zech 1:12: Then the angel of the Lord spoke out and said, “O LORD of hosts, how long will you be without mercy for Jerusalem and the cities of Judah that have felt your anger these seventy years?”
Tob 12:12: I can now tell you that when you, Tobit, and Sarah prayed, it was I who presented and read the record of your prayer before the Glory of the Lord; and I did the same thing when you used to bury the dead.