I tried "I will continue tomorrow" ie without "on" and this was rejected. I have posted a report suggesting that this form, as well as "I will carry on tomorrow", should be accepted. Bhur dtuairimí?

"Leanfaidh mo chroí ar aghaidh."

"Continue on" just doesn't really sound right to my ears. Odd, because I wouldn't object to "carry on". It's simply that "continue" seems to contain a built-in sense of onward, ahead, forward, beyond in my head. It's a bit like the Ulster use of whenever in "Whenever (when) I see him, I'll tell him". It always brings me up short.

What is the grammatical purpose of aghaidh in this phrase? I can't tell if it's part of ar aghaidh.