This might seem a little odd to quote from a dramatic production rather than a philosophical text, but I consider some of the more aphoristic statements that various characters make to be worth noting. Not sure whether I should credit screenwriter/director Terrence Malick of the excellent film version for the text or the original author James Jones, so I'll just give a hefty nod of acknowledgement to both.
Japanese Soldier: Are you righteous? Kind? Does your confidence lie in this? Are you loved by all? Know that I was, too. Do you imagine your suffering will be any less because you loved goodness and truth?
Private Edward P. Train: Where is it that we were together? Who were you that I lived with? The brother. The friend. Darkness, light. Strife and love. Are they the workings of one mind? The features of the same face? Oh, my soul. Let me be in you now. Look out through my eyes. Look out at the things you made. All things shining.
Private Witt: This great evil. Where does it come from? How'd it steal into the world? What seed, what root did it grow from? Who's doin' this? Who's killin' us? Robbing us of life and light. Mockin' us with the sight of what we might've known. Does our ruin benefit the earth? Does it help the grass to grow, the sun to shine? Is this darkness in you, too? Have you passed thro this night?
First Sgt Edward Welsh: Everything a lie. Everything you hear, everything you see. So much to spew out. They just keep coming, one after another. You're in a box. A moving box. They want you dead, or in their lie... There's only one thing a man can do - find something that's his, and make an island for himself. If I never meet you in this life, let me feel the lack; a glance from your eyes, and my life will be yours.
Private Jack Bell: Why should I be afraid to die? I belong to you. If I go first, I'll wait for you there, on the other side of the dark waters. Be with me now.