The kingdom of heaven is like treasure hidden in a field. When a man found it, he hid it again, and then in his joy went and sold all he had and bought that field. Again, the kingdom of heaven is like a merchant looking for fine pearls. When he found one of great value, he went away and sold everything he had and bought it.
Jesus is once again talking in a parable to his disciples. He is saying that when we find Gods, eternal love, it is amazing. It is not something we can see or feel. So that is why Jesus is saying it is like a hidden treasure or a pearl that is hidden. We will find this love in our hearts via emotions.
There will be this amazing physical connection to God who is not a physical being. Also, a person will not be bothered with worldly desires. You will want to leave all that behind, trample over worldly things and now go to that place where eternal life is real. You will put your whole heart and soul into following God because you know deep down in your soul eternal life is real.