I love this verse. God has given us the Holy Spirit. The Spirit is a gift. It is important that we understand the power and abilities of this gift that we now have within us. This verse is huge- it gives us a great description of what the Spirit does and doesn’t do for us. The Spirit does NOT make us timid and fearful. So, if you are feeling those feelings, that is not the Spirit within you. That is your sinful nature.
The Spirit gives us power, love, and self-discipline. We can get up and go do XYZ. We can love others, even when they don’t deserve it. We can show self-discipline with what we consume, food and media. Paul also tells Timothy that he needs to fan the flame of the Spirit within us. In order to harness POWER, LOVE, and SELF-DISCIPLINE we have to continually, daily, fan the flame.