Adolescence represents an inner emotional upheaval, a struggle between the eternal human wish to cling to the past and the equally powerful wish to get on with the future.

John wrote with a very deep love for the human race and a concern for its future.

I have been judged to be a pessimist but what abyss of ignorance and low egoism is not hidden in one who thinks that Man is the god of himself and that his future can only be triumphant?

You can't let your past hold your future hostage.

We're not planning for the future. If we continue to spend ourselves into oblivion, we are going to destroy this nation.