Sri Sri Ravi Shankar: Whatever you find  difficult to understand is not to be understood at all. If it is all going above your head, let it go. Take only what you can understand.

See, everyone’s capacity to gain knowledge is different, but to feel and be in devotion, there is no concept of capacity. Everyone is same and equally capable. There is no special qualification for it. But, when you talk of gaining knowledge, people have a different capacity. Some people can gain more, some less; but it doesn’t make any difference when you have devotion and a feeling of oneness.

Don’t think that God will be happy with you or be fond of you only if you are very knowledgeable. The purpose of knowledge is for your own joy.

To purify your intellect, you need knowledge;
to purify your heart, you need love;
to purify your karma, you need seva;
All three should go together.