This pattern of missional living starts in the heart, moves to hands, and then comes to fruition with the mouth.
Though not entirely sequential there is a principle here that is clearly Biblical. Our heart must be right before God as well as cultivated rightly towards others before we can effectively engage with those who who do not follow Jesus. Additionally, invitation is most effective when preceded by investing in a relationship through acts and words of love and service.
Nothing of eternal significance ever happens apart from prayer.
Nothing shapes our heart like prayer.