The chains of habit are too ...

The chains of habit are too weak to be felt until they are too strong to be broken.
The chains of habit are too weak to be felt until they are too strong to be broken.

More phrases

[The Jews] tried to kill the principles of all religions with the same mentality in which they betrayed Jesus Christ and the same way they tried to betray and kill the Prophet Muhammad.
 Bashar al-Assad
The Warrior Diet is the only diet today that challenges all common dietary concepts and offers a real alternative—guidelines that are not based on superficial restrictions, but rather on true principles of human nutrition.
 Ori Hofmekler
Men are anxious to improve their circumstances, but are unwilling to improve themselves; they therefore remain bound.
Men submit from habit to everything that seeks power.
My mother was the source from which I derived the guiding principles of my life.
 John Wesley

Quotes from the same author

If a man does not make new acquaintances as he advances through life, he will soon find himself left alone. A man, sir, should keep his friendship in a constant repair.
To keep your secret is wisdom; but to expect others to keep it is folly.
Love is the wisdom of the fool and the folly of the wise.
Memory is the mother of all wisdom.
Friendship, like love, is destroyed by long absence, though it may be increased by short intermissions.