Question: What is the meaning of life.

There is not a single, universally true answer to this question. The meaning of life is different depending on standpoint  the world vision of everyone. An For example of it, there are the different philosophical and religious doctrines developed about this topic, some of them, quite dissimilar to each other. For instance, Nihilism argues that life has no purpose, which is completely/directly opposed of a to religious points of view about life.
Which one of these doctrines is the true doctrine? (they may all be truly doctrines! but a system of unproveable beliefs remains mere beliefs) Nobody can answer this question. Sadly when we born nobody gave to us a manual with instructions to follow, with one special chapter about the sense purpose or meaning of life. So everyone does what they can according to the circumstances, sometimes it is useful to cling an ideal but sometimes with the object of that ideal doesn't exist, the only sense of life is to accept face the reality and take try to make something useful of it.

Question

There is not a single, universal answer to this question. The meaning of life is different depending on the world vision of each person. For example, there are the different philosophical and religious doctrines developed about this topic, some of them, quite dissimilar to each other. For instance, Nihilism argues that life has no purpose, which is completely opposite of a religious point of view about life.

Which one of these doctrines is the true doctrine? Nobody can answer this question. Sadly when we born nobody give to us a manual with instructions to follow, with one special chapter about the sense of life. So everyone does what they can according to their circumstances.  Sometimes it is useful to cling an ideal; but sometimes, when that ideal doesn't exist, the only way to make sense of life is to face the reality and take something useful of it.

Very interesting!  You are a very good thinker in English!

Question

There is not a single, universal, answer to this question. The meaning of life is different depending on different peoples opinion's. An example of it is, are the different philosophical and religious doctrines developed on this topic,some not quite dissimilar to each other. For instance, Nihilism argues that life has no purpose, which is the completely opposite of a religious point of view about life.
Which one of these doctrines is the true doctrine? Nobody can answer this question. Sadly, when we were born nobody gave to us a manual with instructions to follow. With one special chapter about the sense of life. So, everyone does what they can according to their circumstances. Sometimes it is useful to cling to an ideal, but sometimes with that ideal doesn't work, the only sense that we have of life is to face the reality and make something useful of it.

Question (Meaning of life?)

There is not a single, universal answer to this question. The meaning of life is different for every person, depending upon the world vision of everyone an individual. An example of this it, are the different philosophical and religious doctrines developed about this topic. Some of them, quite dissimilar to each other. For instance, Nihilism argues that life has no purpose, which is completely opposite of a religious point of view about life.
Which one of these doctrines is the true doctrine? Nobody can answer this question. Sadly when we born nobody gives to us a manual with instructions to follow, with one special chapter about the sense of life. So everyone does what they can according to the circumstances/situations. Sometimes, it is useful to cling to an ideal situation/circumstance but sometimes when that situation doesn't exist, the only sense of life is to face the reality and take something useful/worth from it.

Keep it up.

Best wishes :)