1 John 3:24

Those who obey his commands live in him, and he in them. And this is how we know that he lives in us: We know it by the Spirit he gave us.

(v24, NIV)

So what happens when you obey his commands? The people who obey his commands live in him and he in them. There is this abiding that occurs. You who live in such a way that is obedient to his commands is such a way that you live in him. In addition, he lives in you. It's not that the obedience produces this relationship. Rather, the obedience is an outpouring or result of the relationship we have with him.

Now it is God who makes both us and you stand firm in Christ. He anointed us, set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.

(2 Corinthians 1:21-22, NIV)

With regards to the Spirit, it is proof that he lives in us. In 2 Corinthians, it is described as a deposit or guarantee. Receive the Spirit and live in obedience to him as dear children.