Our personal growth in the faith is not just for our own benefit but to make us qualified to be effectively part of the body (1 Corinthians 12:12) , that is when love is truly said to be worthy to qualify us for the opening of eyes for the next phase of faith walk. If I don't build up faith, I can't love the brethren(Galatians 5:13) because  faith is the process that accumulates into an estate called love, for example, if I am lazy at prayers, I would not be able to function in brotherhood well because I would be a weak-link in intercession, so also if I don't build up stature in giving, I would make others lack, it is not just about me but about the brethren, God does not want to make us good just for ourselves alone but to make us shareable in the house of God. so when I am paying and giving attention to my growth, I am building capacity to love the brethren  the more(Ephesians 4:16 ).