Good advise from Mom. Make sure you are saying hello as soon as you approach the horse (letting him smell the back of your hand) Move slowly Horses hate quick movers, so the slower the better till he figures you out.
I like to use the face itself rather than the halter if I need to move my horses head during grooming or tacking. Just use the bridge of the nose to gently move the head. Around a horses head, gentle and slow is always the key.
"Until one has loved an animal, part of one's soul remains unawakened..."
- Anatole France