Without constancy there is ...

Without constancy there is neither love, friendship, nor virtue in the world.
Without constancy there is neither love, friendship, nor virtue in the world.

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

True happiness arises, in the first place, from the enjoyment of oneself, and in the next, from the friendship and conversation of a few select companions.
He only is a great man who can neglect the applause of the multitude and enjoy himself independent of its favor.
Let freedom never perish in your hands.
Young men soon give, and soon forget, affronts; old age is slow in both.
An honest private man often grows cruel and abandoned when converted into an absolute prince. Give a man power of doing what he pleases with impunity, you extinguish his fear, and consequently overturn in him one of the great pillars of morality.