You have to learn to rejoice in the differences, and agree to just accept them between you. He is probably thinking exactly the same about why you won't see things HIS way.
In 30 odd years my hubby and I have failed to agree on any number of things. Sometimes we go with my opinion and sometimes with his, and sometimes we sit on opposite sides of the fence and sulk!
We even disagree on football teams to such an extent that if his team loses to mine, he'll sulk and not talk to me for days! (bonus!
)
Whether your disagreement is over something trivial like that or something more fundamental, like an issue with a child, or religion, you have to weigh up the consequences of insisting on your point of view over his, and whether the pain and trouble is worth it. If you think it is, then perhaps not trying SO hard to convince him, might slowly bring him round. Quietly highlighting the advantages of your viewpoint might work..
I find that some ways to get my hubby to do something I want, and he may not, is to either try and make it look like it was his idea, or be violently against it, so that he takes the opposing view just to be contrary....