I wish you enough sun to keep your attitude btight (阳光让你的态度保持明朗)--------bright?
I wish you enough rain to appreciate the sun more (雨水让你懂得欣赏阳光) --------appreciate should be enjoy, I think.
I wish you enough happiness to keep your sprit alive (幸福让你精神活跃)--------alive shoul be lively
I wish you enough pain so that the smallest joys in life appear much bigger (痛苦让生活中最小的快乐也尽放光芒)-----bigger,光芒?
I wish you enough gain to satisgy your wanting (收获来满足你的需求)-------satisgy, satisfy?
I wish you enough loss to appreciate all that you possess(损失让你珍惜你的拥有)-------appreciate, 珍惜?
All of what more, I think you shouldn't use"I wish you enough " everywhere.
I said too much, haha.