9460. 'From everyone whose heart is willing' means that all things should be offered out of love, and so in freedom. This is clear from the meaning of 'whose heart is willing' as in freedom. The reason why offering them out of love is meant is that all freedom is rooted in love; for what a person does out of love he does in freedom.

'Heart' has to do with love because it has to do with the will, see 7542, 8910, 9050, 9113, 9300.

All freedom is rooted in love or affection, 2870-2893, 3158, 9096, and this is why all worship must be offered in freedom, 1947, 2880, 2881, 7349.

2881. If it had been possible for man to be reformed under compulsion there would not be anyone at all in the universe who would not be saved. Nothing would in fact be easier for the Lord than to compel man to fear Him, to worship Him, or indeed so to speak to love Him. The means available to Him are countless. But because that which is done under compulsion is not joined to a person and so does not become his own, it is therefore quite alien to the Lord to compel anybody. As long as a person is engaged in conflicts, that is, is a member of the Church militant, it seems as though the Lord does compel that person and thus that he has no freedom; for he is at that time constantly battling against self-love and love of the world, and so against the freedom into which he was born and into which he has grown up, and as a consequence he seems, as just mentioned, to have no freedom. But in those conflicts in which he is victorious he possesses greater freedom than outside of them; yet this freedom does not originate in himself but in the Lord, though it still seems to be his own; see 1937, 1947.