Thoughts trigger Feelings. Happy thoughts that correspond to your ideal life are going to generate happy feelings. When you think thoughts that support your vision, then blam! you hit the target. Everyone wins.
Again, Thoughts trigger Feelings. Thoughts about lack and limitation, complaining that sucky things are happening and that good things are not happening, thoughts that criticize yourself or others... these types of thoughts generate yucky feelings. Darts are flying all over the goddamn place and people are losing eyes and limbs. It's a huge Kryptonite-laden mess.
So which one do you prefer? Yeah, I thought so.