It is possible to demonstrate God's existence, although not a priori, yet a posteriori from some work of His more surely known to us.

The Study of philosophy is not that we may know what men have thought, but what the truth of things is.

Law has the power to compel: indeed, the ability to enforce is a condition of the ability to command.

Every judgement of conscience, be it right or wrong, be it about things evil in themselves or morally indifferent, is obligatory, in such wise that he who acts against his conscience always sins.

The light of faith makes us see what we believe.

Devotion is a certain act of the will by which man gives himself promptly to divine service.

If, then, you are looking for the way by which you should go, take Christ, because He Himself is the way.