Some guitarists use a capo to play in a different key more easily. A capo is a device which a guitarist uses on the neck of a stringed instrument to shorten the playable length of the strings—hence raising the pitch. It effectively means the guitarist does not have to learn alternative fingerings for every key. It makes life easier!
Not all guitarists use a capo; a capo is not an essential part of playing the guitar. But for many, the capo gives additional abilities and harnesses the abilities the musician has in new ways. In the same way, the baptism of the Holy Spirit is not ‘essential’ to being a Christian – you can be a Christian without the baptism of the Holy Spirit. But the baptism of the Holy Spirit gives us access to God’s power and is a gift promised to us by Jesus. This gift enables us to access God’s power, to experience God’s power in new ways. Paul urges us to be filled with the Spirit daily, (Eph 5:18)
God’s gifts for us are good; He is a loving Father who give good gifts (see Luke 11:11-13). Let’s not spurn the gifts He want to give or run from them because they may involve experiences beyond our understanding or explanation. We can trust God to give good gifts and the Holy Spirit longs to live within us, helping us to live each day in God’s strength and power.