Note 26 at Eph. 4:14: The Lord doesn't want His saints to remain in the nursery forever. He wants us to mature. From this verse, we can see that one of the characteristics of children is that they are easily deceived. They are "gullible." They are not stable. This means the Body of Christ today must be pretty immature because it's not uncommon for Christians to follow every new "fad" that comes along. One of the things that must take place to move from childhood into sonship is spiritual discernment. This comes from being grounded in the Word of God.

Note 27 at Eph. 4:14: The Greek word that was translated "tossed to and fro" here is KLUDONIZOMAI, which means, "to surge, i.e. (fig.) to fluctuate." It comes from the root word KLUDON which describes a wave of the sea. So Paul is speaking of being tossed about the way something floating in the sea would be. Mature Christians are not "like a wave of the sea, driven with the wind and tossed" (Jam. 1:6). That's double mindedness and it prevents us from receiving from God (Jam. 1:7-8)

Note 28 at Eph. 4:14: The word "sleight" was translated from the Greek word KUBEIA which was the name for a cube for dice playing. It literally meant gambling. In the same way that card "sharks" deceive with the sleight of hand, Paul is saying people also deceive immature Christians, promising them everything, but delivering nothing. This is the only time this word was used in the Bible.