What’s the 70s song that has the line “I feel a fire in my heart”?

Heard this one (think it is quite a famous track) the other day but wasn’t fast enough to Shazam it. Pretty sure it’s 70s or thereabouts and definitely had a disco vibe to it. I’m pretty sure the lyrics that keeps repeating in the chorus is “I feel a fire in my heart” sung by a male vocalist but alas I have searched this for a while now and can’t find a match. Can anyone help me identify this earworm? 

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