“The main function of man is not to exist, but to live. I'm not going to waste my days trying to lengthen them. I will use my time.” Jack London By E-MotivasyonWords of Science and Wisdom, Words About People0 comments ▶Dr. Tayfun Topaloğlu Youtube Instagram: @drtayfuntopaloglu “The main function of man is not to exist, but to live. I'm not going to waste my days trying to lengthen them. I will use my time.” Jack London