To me, the meaning of life is to survive and make sure your people survive.... to me that is the basic pillar of life...if you have no faith in anything and ask yourself what is the meaning of life? what kind of answer can you can up with?
Every single creature tries to follow that pillar.
If there was no life, there would be no need to do those things. Unlike Christianity, I do not believe that life is a god's reality TV show. Mars, Venus, trillions of planets get along just dandy without life. We do not need to be here to make Earth exist. We are somehow here, so better make sure it stays that way.
And to me, helping and being kind is part of that important pillar, to ensure that your species continues in an equal or better way than you are now. I like to think about how I would feel if I was in another person's position, because like me, they are also trying to get by. So the point of doing good and helping people is to be a postive aspect of the community. To be selfless in the face of betterment for mankind. They need to survive just as you try to. I know I am 1/6.5+ billion people and 1/alot of total creatures, and we all have to share this planet. You, your people, and your species exist... so dont fuck it up.
There is no meaning to life, the universe is uneffected by Earth's precense. We are nothing compared to anything. Our domain is 200 miles above the surface to a little bit below the surface. That is nothing, the whole solar system is not even the size of half a pixel at any real distance. So do what you can with your 1/50000th of a pixel.
You live to live, you survive to ensure living. You help other people survive, you help the species survive. You help anything to deserves to live. Help those who cannot help themselves. That is not a meaning, but a drive to make the community a better place.
If someone help's a person or animal... I hope they are doing it for the sake of that person, not for god-points or god fear or something.