If being half-hearted were good for you, God would have asked you to look for Him half-heartedly.
“[S]earch for Me with your whole heart.” Jeremiah 29:13
“We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.” C. S. Lewis