The secret of man's nature lies in his religion, 45 in what he really believes about the world and his own place in it. Froude.
The secret of man's success resides in his insight into the moods of men, and his tact in dealing with them. J. G. Holland.
The secret of our existence is the connection between our sins and our sufferings. (?)
The secret of success in society is a certain heartiness and sympathy. Emerson.
The secret of success is constancy to purpose. Disraeli.
The secret of tiring is to say everything that can be said on the subject. Voltaire.
The secret things belong unto the Lord. Bible.
The secrets of great folk are just like the wild beasts that are shut up in cages. Keep them hard and fast snecked up, and it's a' very weel or better—but ance let them out, they will turn and rend you. Scott.
The secrets of life are not shown except to sympathy and likeness. Emerson.
The seed of knowledge ripens but slowly in the 5 mind, but the flowers grow quickly. Bodenstedt.