Where is the meaning of life?

If we will die one day , yes, of course, we all will be dead. And if you see that your families are still happy living without you, or that your husband/wife has found someone to replace you, what will you think? your children have another father or mother, and they are happy together. What will you feel? Pain or comfort? If what you did and who you loved in your life belongs to another, what will you think? Hatred or congratulations? (or, "Will you hate them or congratulate them?")
When you find that the ones you love live better without you, what will you think? (This sounds certain, "When you find..." If you want to speak of a possible outcome/event, you should use "if". For example, "If you find...")