The best proof of love is trust.

In this aphorism, Joyce Brothers frames trust not as a byproduct of love but as its clearest evidence. Love can be declared in words or displayed through gestures, yet those signs can be performative or temporary; trust, by contrast, requires sustained vulnerability and a willingness to grant another person freedom without constant monitoring or control. The line also implies an ethical dimension: to love well is to respect the other’s agency and reliability, and to build a relationship where honesty and dependability make suspicion unnecessary. As a psychological maxim, it highlights that intimacy is measured less by intensity than by the security two people can create together.