One unerring mark of the love of truth is not entertaining any proposition with greater assurance than the proofs it is built upon will warrant.
The point is not to take the world's opinion as a guiding star but to go one's way in life and working unerringly neither depressed by failure nor seduced by applause.
I align myself with almost all researchers in assuming that anything we do is a composite of whatever genetic limitations were given to us by our parents and whatever kinds of environmental opportunities are available.