Insincerity is always weakness; sincerity even in error is strength.

Sincerity is moral truth.

Originality is independence, not rebellion; it is sincerity, not antagonism.

Sincerity is not only effective and honourable, it is also much less difficult than is commonly supposed.

I'm not weak, I've just been strong for to long.

The great enemy of clear language is insincerity. When there is a gap between one's real and one's declared aims, one turns, as it were, instinctively to long words and exhausted idioms, like a cuttlefish squirting out ink.