“Nothing is more useful to man than man.”Baruch Spinoza · Etica · 1677 · Partea a IV-a, propoziția 35, corolarul 1
Friendship is not sentiment but pure logic: man is man's greatest resource.
Spinoza rejects the image of the self-sufficient sage: a person's power grows most through other people, who share knowledge, work and joy. Seeking friends is therefore not sentimentality but pure logic. A doctor and an engineer who solve each other's problems produce more than each alone, precisely because man is man's supreme resource.
The card shows that humans are the most useful resource for one another. The next step: not every company helps equally. Spinoza distinguishes between people who drag you down through envy and rivalry, and those who increase your power to think and act. Rational friendship therefore has a criterion: seek people with whom joy is shared without being diminished. A simple example: when you cook with a friend, the meal is the same, but the evening is richer. When you cook with someone who needs to prove they cook better, the same meal becomes exhausting competition. The choice is not about fondness, but about direction. The open question: in everyday life, how do you recognize who makes you freer and who makes you smaller?
Why it matters An argument against isolation: investing in relationships is the most profitable investment in your own life.