Should we strive for manifesting everything our heart desires the way the Law of Attraction folks encourage us to? Well, we can try to but having everything our heart desires is unlikely to make us happy either. We cannot visualize the missing God connection; we don't know what peace truly is and are thus unable to manifest it.
What we can do instead is to live life as a Tao master; that is, welcoming life moment by moment. Like an artist we can discover divinity in everything life presents to us. Like a mother we can recognize love wherever we are. God is next to us every step of the Way; all we have to strive for is to be open to the next moment and we can see Her.