Future life (2) Addition (2) Ethics (2) Vida futura (2) Ética (2) Morale (2) Vie future (2) espèce (1) physique (1) philosophie (1) méthode (1) règlement (1) Instruction and study (1) Dynamics (1) Symbolism (1) Language (1) Philosophy (1) Civilization (1) History (1) Assaying (1) Writing (1) Virtue (1) Thought and thinking (1) Teaching (1) Taste (1) Spirit (1) Species (1) Self-reliance (1) Self-confidence (1) Science--Methodology (1)