The past is always tense, the future perfect.

心理治疗的目的是使人获得自由。

My blindness is not a tragedy, but an opportunity to see the world in a different way.

生活中最鼓舞人心的事，莫过于看到一个人拥有正当合法的抱负，哪怕这抱负还很幼稚。