Leo started having such thoughts because his Ascender's Status had already reached level 1 Gold Grade and according to him, if he completed the [Main Ascending Mission], he would have reached Level 1 Purple Grade Ascender or even higher.
[The Benefits of a Gold Grade Ascender are as follows:
1) They can passively gain 4 units of God Energy every day.
2) They can pick any two items from the world they just ascended from.
3) They can bring out at least one living being that has close relationship with the ascenders from their ascender world that would remain loyal to the ascenders]
Soon, the benefits of the Gold Grade Ascenders were shown and compared to the Silver Grade, the passive God Energy doubled and instead of one item, he could bring two items from the world.
Moreover, there was a new benefit which could let him bring out a living being.