How does the meaning of life evolve

Yah, thats the question I ask to myself whenever I think about my son. This little one is growing very fast and one day will grow so much that I will look like an old man in front of him as my father looks today. But there is a sense of pride that I bring to peopla around me. Will he be able to bring similar value system and success as I have got in my life. Does not matter... he should evolve as a good person, something that some people say i am not. But i dont mind because i alwasy wanted to be a good man. The world didnt take it in the right spirit. So for all those who are bad, i need to be bad and need to protect myself from them and sometime should pay them back in their own terms. He should not do that. He should not inherit that biting spirit from me but what will he do when bad people try to hit him? May be he will read my blog and will learn that it is necessary to be good in life but is also necessary to protect one's self esteem and respect and also fight for waht is right in life.. otherwise this is a very bad world and one wonders how good people will survive in this world!!!