BhaktiYoga as stated in Bhagwat Geeta

This world is full of variety, we see different things, different people, people with different attitude, different mood. When we look at crying person we  feel sad, when we look at smiling person we feel pleasant. But even though these opposite things the base of every small little thing is the same, it’s the same God.

Certain things makes us happy, certain things we don’t like so we avoid it even though its our duty. This is called Moha. To overcome Moha we should understand God. We should be able to see God everywhere, in all living non-living things. Then only we will overcome Moha.

BhaktiYoga is a way to understand God. Bhakti, devotion gives you pleasure. Any karma done with devotion is a pleasant experience. Devotion fulfills your life with happiness. You wont need any external means to make yourself happy. Once you know happiness through devotion you naturally wont enjoy other means to seek pleasure.

Bhagwat Geeta states 3 kind of Devotees.

1.       Sakam Bhakt, 2. Nishkam Bhakt but onsided, 3. Smpoorna Bhakt

1. Sakam bhakt – Devotee with reason goes to God with some desire. He asks God to fulfill his wish. Although the devotee goes to God for some reason such devotee is not considered inferior as he is asking God to fulfil his wish and not some other person. This behavior itself is very uncommon. God is kind enough to help such devotee to continue his devotion, he answers his prayer. This is the first step to be Nishkam Devotee.

2. Nishkam Bhakt – Devotee with no reason, wish in his mind.There are 3 kind of Nishkam Bhakt
Aart – Who loves God, who is desperate to meet God

Jidnyasu – Who is curious to know God, who is curious about everything in this world.

Artharthi – Who always do the things for betterment of society

3. Sampoorna Bhakt – Complete devotee who sees God in every small little things. He finds God everywhere. He sees God in Sun, Moon, Animals, Plants. He doesn't find anything bad anywhere as he sees God everywhere.