In simple terms, Bhakti is devotion to God. Being devoted to God, whatever a person does is done for God, for His creations. The best form of bhakti is when you don't expect even moksha in return. You simply don't care about what you will get. You only care about the enjoyment of being close to God.

Temporarily feeling this emotion but then switching back to your greedy self - drowning in material delusions - is not Bhakti. It's an escape, and maybe entertainment for some.

Without this conscious thought of devoting yourself to God, even the most extreme austerities don't qualify for "bhakti".

But once you have that sense of surrender, everything you do is bhakti!

Bhakti is a condition (or a source), what a bhakt does are its signs, results and byproducts.

If you copy a bhakt's actions, you're not doing bhakti. If you want to copy, copy his state of mind.