This is a message about HOW we get this fruit of the Spirit of love to produce in our lives. It starts with first receiving the love of God towards us.

Scripture References
Mark 12:30-31
John 15:12-13
1 Cor. 16:14
1 John 4:19
1 Thess 4:9
Deut. 33:12
Rom. 5:8-11
Rom. 8: 33-39
Eph. 3:17-19

The word for rooted in Greek is  rhizoō- to become stable
The word for grounded in Greek is themelioō -to lay a basis for, that is, - (lay the) found (-ation),settle.
Filled in Greek is plēroō- (be) complete,  fill (up), fulfil, (be or make) full, perfect, supply.
Fullness in Greek is plērōma- completion, what is filled (as container - which is put in to fill up, piece that filled up, fulfilling, full.

1 Cor. 4:21
Zeph. 3:17
1 Jn. 4:18
Rev. 12:11
2 Tim. 1:7
Luke 7:47