Taking up Lemke’s (2000) critical questions of how moments add up to lives and social life, we articulate theoretical and methodological frameworks for _perezhivanie_ and becoming, challenging binaries that splinter entangled flows of _perezhivanie_ into frozen categories. Working from a flat CHAT notion of assemblage to develop an ontology of moments, we stress consequentiality, arguing it emerges in intersections of embodied intensities (not only affective, but also indexical, intra-actional, and historic), the dispersed bio-cultural-historical weight of artifacts and practices, and dialogic (...) resonances across moments. Methodologically, we take an ethico-onto-epistemological perspective to systematically study perezhivanie. The bio-ecological model of rich environments (centered around meaningful complexity, agency, and individual optimization) offers both a key framework for understanding becoming and a design framework for transdisciplinary realizations of ethico-onto-epistemological practice. We illustrate these frameworks with examples from four research projects: a university physics lab group doing and writing an experiment, a former pastor managing bipolar disorder and rejecting faith, a sustained social justice education program at a university, and intersections of aging policies, media representations, and stroke survival in Brazil. Finally, we argue that an ontology of moments centered on consequentiality can illuminate _perezhivanie's_ relationship to becoming and that the model of enriched environments offers metrics to assess and design environments. (shrink)