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.

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
. . .