Reason and the reasoning ...

Reason and the reasoning faculty need no foreign assistance, but are sufficient for their own purposes. They move within themselves, and make directly for the point in view. Wherefore, acts in accordance with them are called right acts, for they lead along the right road.
Reason and the reasoning faculty need no foreign assistance, but are sufficient for their own purposes. They move within themselves, and make directly for the point in view. Wherefore, acts in accordance with them are called right acts, for they lead along the right road.

Quotes from the same author

Loss is nothing else but change, and change is Nature's delight.
He who lives in harmony with himself lives in harmony with the world.
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.
Everything that happens as it should, and if you observe carefully, you will find this to be so.
There is nothing happens to any person but what was in his power to go through with.