1146

Psychology.

Every action needs to be prompted by a motive.

To know and to will are two operations of the human mind.

Discerning, judging, deliberating are acts of the human mind.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

1145 * 1147

XVIII * XX

Notebooks of Leonoardo da Vinci

XIX: Philosophical Maxims. Morals. Polemics and Speculations.

. . .

Prayers to God.

1132,

1133

The powers of Nature.

1134,

1135,

1136,

1137,

1138,

1139

Psychology.

1140,

1141,

1142,

1143,

1144,

1145,

1146,

1147

Science, its principles and rules.

1148,

1149,

1150,

1151,

1152,

1153,

1154,

1155,

1156,

1157,

1158,

1159,

1160,

1161

What is life?.

1162,

1163

Death.

1164

How to spend life.

1165,

1166

. . .