I always hesitate between within me or within myself when the subject is I. Is there a rule that can help me decide? For example, in this sentence
The fullness of life that we receive within us/ourselves every time we (do something).
I just can't decide which one is correct and sounds more natural. I know I could omit within us/ourselves, but I am not asking for a re-writing of the sentence. Within is important for the text and needs to be there. My question is how I can decide which pronoun to use after within. Definitions in dictionaries like Cambridge, and M-W don't address this issue.
Edit: Please note that I do know that both variants, with us and with ourselves, exist, so I do not need examples of it, especially if these are examples with other prepositions. I find within a particular preposition with a certain notion of reflexive connotation, if I may call it that way. Also, I am interested in within marking direction as in my example: receive denotes a movement of something from without within, so examples of within used with static verbs like experience or be do not really match what I am looking for. And yes, it is important that the subject is of the same person and number with the pronoun after within, as it seems to make the reflexive pronoun mandatory, yet in some cases it does remain optional. Whence my dilemma.
Edit 2: This was meant to be a comment but the link has too many characters and doesn't fit. This GNgram convinces me that receive within oneself does exist, but it is outdated (which I welcome - this is the tone of the text I am working with). I wasn't aware though that it was (almost exclusively) restricted to religious contexts. I am quite amazed by the discovery.

Standing to be corrected, I suggest "is received within me…" is more obvious than "within myself…".
– Robbie Goodwin Aug 22 '21 at 23:39