This image does not reflect accurately the Biblical writings regarding the creation of the first man (Old Testament), because the artist merged here another narrative (New Testament), in which there is the Father and the Son generating the Holy Spirit, which should descend and illuminate the clergymen1 This is why the imminent contact of fingers instinctively suggests a creation of energy.
(det.)
A similar beam of inspiring energy is actually materialized in Michelangelo’s The Conversion of Saul/Paul, later painted in the Cappella Paolina, also in the Vatican.
Michelangelo Buonarroti The Conversion of Saul/Paul Cappella Paolina
1 In fact this was a major theological issue for the Roman Catholic Church, since the dissident Eastern Orthodox Church considered the Father as the only source of the Holy Spirit.
2