Note 22 at 1 Cor. 12:9: All believers have faith. That's how they got saved (Eph. 2:8). They actually have the same faith as Jesus (see note 16 at Rom. 12:3, p. 826) but their soul has to be matured through the renewing of the mind to operate in that faith. That's the reason the scriptures speak of great faith (Mt. 8:10) and little faith (Mt. 8:26). We can use different amounts of faith.

But the faith mentioned here as a gift of the Holy Spirit is different from the faith that we received at salvation. This gift of the Spirit is a supernatural imparting of faith that doesn't come through the normal renewing of the mind process (see note 9 at Rom. 12:2, p. 825). It is a gift for the purpose of helping those who are struggling in faith to believe.

Many things that we need come directly "according to our faith" (Mt. 9:29). If our faith is weak we need to strengthen it and/or seek out a person with the gift of faith to help us (see note 17 at v. 8).

Note 23 at 1 Cor. 12:9: Notice that this says "gifts" (plural) of healing. According to verses 5-6, there can be different administrations and operations of the same gift (see notes 9-10 at v. 5-6, pp. 927-928) which provides plenty of variety through just one gift. But this specifically mentions a plurality of gifts of healing.

Note 24 at 1 Cor. 12:9: The gifts of healing are supernatural powers released through an individual for the purpose of bringing healing to others (see note 25 at this verse). All believers can lay hands on the sick and see them recover (Mk. 16:17-18; Jn. 14:12) but there are some people who are called to a ministry of healing the sick see note 30 at v. 11, p. 931). These people are endued with the gifts of healing and this characterizes their ministry.