The only secret I can claim to have is concentration, and that's something that can't be taught.
Lucian FreudThe painter must give a completely free rein to any feeling or sensations he may have and reject nothing to which he is naturally drawn.
Lucian FreudThe painting is always done very much with [the model's] co-operation. The problem with painting a nude, of course, is that it deepens the transaction. You can scrap a painting of someone's face and it imperils the sitter's self-esteem less than scrapping a painting of the whole naked body.
Lucian Freud