The gem cannot be polished without friction nor man without trials.
Sincerity is the end and beginning of things; without sincerity there would be nothing.
From a grain of sand in the Pearl comes.
Don't worry about being acknowledged by others; worry about failing to acknowledge them.
He who kisses girl on hillside is not level
Sincerity is that whereby self-completion is effected, and its way is that by which man must direct himself.