References – SN 56.31: The Siṁsapa Grove 
“Reference to ‘spirit’ is conspicuously absent from Buddhist scripture. However, there is acknowledgement of rebirth, so the belief that man is more than physical matter exists. Why is there so little written about spirit?” Answered by Ajahn Pasanno. [Nature of mind ] [Tipiṭaka] [Rebirth] // [Culture/West] [Sense bases] [Impermanence] [Naturalness] [Four Noble Truths]
Sutta: SN 56.31: The Handful of Leaves.