D&C 46

In revelation the Savior said -

"..ye are commanded in all things to ask of God, who giveth liberally; and that which the Spirit testifies unto you even so I would that ye should do in all holiness of heart, walking uprightly before me, considering the end of your salvation, doing all things with prayer and thanksgiving..." (Doctrine and Covenants Section 46:7)

The Lord has made it clear that we have an obligation, that is we are commanded to "ask of God" in all things. He promises that He will give liberally by His Spirit or the Holy Ghost. And what He gives we must do in "all holiness of heart". That is -

"...ye must practise virtue and holiness before me continually..." (Doctrine and Covenants Section 46:33)

As we do so, as we walk uprightly in prayer and thanksgiving we become worthy to receive His Spirit. As we do, we are "in the Spirit". The Lord explains how he gives liberally -

"...he that asketh in Spirit shall receive in Spirit..." (Doctrine and Covenants Section 46:28)

And then He explains why He gives liberally to those who are "in the Spirit" -

"He that asketh in the Spirit asketh according to the will of God; wherefore it is done even as he asketh." (Doctrine and Covenants Section 46:30)

If we are worthy and in the Spirit, we will as nothing but that which is according to the will of God. Therefore, He willingly and liberally gives in the Spirit - because it is His will.

With all that He does liberally give the Lord provides two important instructions or requirements, that is -

"...all things must be done in the name of Christ, whatsoever you do in the Spirit..." (Doctrine and Covenants Section 46:31)

and -

"ye must give thanks unto God in the Spirit for whatsoever blessing ye are blessed with." (Doctrine and Covenants Section 46:32)