Since Christians do not actively “take” the Spirit, but passively receive the sovereign Spirit, what are they to do? As Dr. Martyn Lloyd-Jones pursues this question in this sermon on Romans 8:15 titled “Spirit Baptism and Fullness,” he sets the context of the passage. He notes that Spirit baptism is an extra – a plus. It is an additional assurance children of God experience. In other words, it is not something every believer who has the Spirit of adoption experiences. Nevertheless, it is something all should desire. In Romans 8:15, the apostle Paul elaborates on Spirit baptism, or being filled with the Spirit. Dr. Lloyd-Jones encourages all Christians to genuinely seek the fullness of the Spirit, but not by trying to “seize” the Spirit. Furthermore, Christians cannot pretend they can take it by someone laying hands on them. How does one get it then? Dr. Lloyd-Jones teaches that it is through obedience and prayer. In the end, however, Christians rest knowing the Holy Spirit is sovereign. If indeed the Spirit does grant this assurance, the Christian will surely know it. Let them not, however, pretend to have it, warns Dr. Lloyd-Jones, unless they actually do. Listen as he teaches on the joys, and potential pitfalls, of Spirit baptism.

http://www.mljtrust.org/sermons/spirit-baptism-and-fullness/