Existence is the coherence of manifested (𝙢𝙖𝙣) and un-manifested (𝙥𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖). Basic interactions happen at a man to man level with disregard to 𝙥𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖; Krishna termed this as the path of demons (7.15). The next level of interaction is between man and 𝙥𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖. This transition starts as one gets tired of chasing mirages or is vexed by misery.
In this regard, Krishna says these interactions or worship between 𝙢𝙖𝙣 and 𝙥𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖 are of four types. The first category of worshippers want to remove their difficulties, the second want to attain wealth, success or peace of mind, the third want to attain knowledge and the fourth are 𝙅𝙣𝙖𝙣𝙞 (wise) (7.16).
He says that the first three, who are otherwise deprived of wisdom, approach different forms (Gods) to fulfil their desires (7.20). This is like consulting the concerned doctor based on ailments. He further says that when they worship with 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 (trust with commitment), he (Krishna) makes that 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 unflinching (7.21) and their desires get fulfilled because of their 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 (7.22) but these three paths give limited results (7.23).
Firstly, this appears to run contrary to 'performing our 𝙠𝙖𝙧𝙢𝙖 without expecting the fruits of action (2.47)' which is the fundamental attribute of the eternal state. Out of compassion, Krishna is helping us with the gradual transition from evil or darkness to the bright light of the eternal state which is desireless.
Secondly, he says that their 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 fulfils their desires and he is behind that 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖. This implies that our 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 in a relationship; towards God or towards work bestows due rewards to us. If we ever attained anything in the physical world it's because of the presence of our 𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖. 𝙎𝙝𝙧𝙖𝙙𝙙𝙝𝙖 is the same dedication even in adverse situations where we need to have patience and that's why it is said '𝙨𝙝𝙧𝙖𝙙𝙙𝙝𝙖 with 𝙨𝙖𝙗𝙪𝙧𝙞 (patience)'.