An excuse for sin.

And when I hear it said that God is good and He will pardon us, and then see that men cease not from evil-doing, oh, how it grieves me! The infinite goodness with which God communicates with us, sinners as we are, should constantly make us love and serve Him better; but we, on the contrary, instead of seeing in his goodness an obligation to please Him, convert it into an excuse for sin which will of a certainty lead in the end to our deeper condemnation.
— Saint Catherine of Genoa (1447-1510)

How terrible is sin…

Know for a certainty that if men understood how terrible is even one solitary sin, they would rather be cast into a heated furnace, and there remain, living both in soul and body, than to support such a sight. And if the sea were all fire they would cast themselves therein and never leave it, if they were certain of meeting the sin on doing so.
— Saint Catherine of Genoa (1447-1510)

Pride is an illusion…

Pride is an illusion, a lie and a thief. And since it is a truth of faith that we are nothing, he who esteems himself and thinks that he is someone is a seducer who deceives himself.
— Saint John Eudes (1601-1689)

Scruples hinder…

Scruples, too…  hinder devotion; for they are like thorns which prick the conscience and diquiet it, and will not allow it to find repose and comfort in God.
— Saint Peter of Alcantara (1499-1562)