YOUTH:
Lack of experience, idealism, heart rules head, lack of knowledge, gullibility, rose tinted glasses, seeking a mind blowing 'spiritual' experience and hoping this will teach us the ultimate 'truth' about life and its purpose. A hope for the future that if we work hard enough and follow a particular lifestyle, the answers to the meaning of life will eventually be revealed. The desire to be 'special' with esoteric knowledge not understood by many others, which we can then teach others to make ourselves feel important and superior. The feeling that we have the power to single-handedly change the world if we are determined enough or have sufficient faith.
AGE:
Rationality, scepticism about the supernatural due to lack of evidence, disbelief in any gods, especially caring and loving ones, frustration at not having found finding answers to the suffering in the world, a realisation of our own insignificance and acceptance of our ineffectiveness and impotence to make significant changes without the help of others.
(On second thoughts, sorry, perhaps 'impotence' was not a good choice of words in relation to age!)
But also a sense of contentment in realising there is no benefit in wishful thinking and relief and a sense of peace at coming to terms with reality.
Atomant, I dont know how old you are, but I very much understand the feelings you expressed in your opening post.
I have found that as a Humanist, my aim to do whatever little good I can wherever and whenever I can, gives satisfaction and meaning to my brief existence.
Although I abhor the amount of suffering in the world, my acceptance that there is no god or other supernatural power who is going to step in and change everything to take away the pain, injustice and inequalities in the world, leads to a deep sense of personal responsibility to do my bit.
And a belief in the collective responsibility of all of us humans to work together to make the necessary changes, not wait for an unknown invisible power to finally wave a magic wand.
Change for the better is frustratingly slow but it's speeding up in recent times. It's not a coincidence that the more secular our society has become, the more science and technology and society have had the freedom to make advances and improvements that have alleviated suffering.
There's still a long way to go, of course, but I fear the frustration and helplessness you expressed in your opening post will likely lead to cynicism and depression unless you can find a way to appreciate the positive progress we are making.
It's all too easy to focus on the headlines of bad news like terrorism and crime, but when you step back and compare life now to any time in history, it is clear that overall we are becoming more humane as a society as we lose belief in gods and take on belief in our own power to effect change for the good, in the long term.