He who cannot put his thoughts on ice should not enter into the heat of dispute.

Those who cannot understand how to put their thoughts on ice should not enter into the heat of debate.

Thoughts are the shadows of our sensations -- always darker, emptier, simpler than these.

Thoughts that come with doves' footsteps guide the world.

Argument need not be heated; it can be punctuated with courteous smiles - or sympathetic tears.

All truly great thoughts are conceived by walking.