To any mental state there corresponds a physical condition.

Hate engenders hate. Hate spreads to nations, and from this cause we have devastating wars. In the contemplation of these wars and their origins there is something humiliating to our human race. No Hymn of Hate can ever be a paean of humanity.

Vanity is apt to inspire contempt, but that becomes immediately tempered by a gentler and more gracious feeling; for the vain man desires to win our approbation, and in this way he flatters us.

Every anxiety is a mild form of premonition, and from that point the shade deepens till we get the forebodings and hauntings that merge into lunacy.

Jealousy is one of the wickedest of all the passions. It is that which has been the most fruitful mother of tragedies, murders, and wars. But reprehensible though it is, jealousy is almost rather to be pitied than blamed--its first victims are those who harbour the feeling.

Intuition without reason is the fertile mother of blunders and wrongs.

Intuition is the soul within the soul.