At the time of Sacrosanctum Concilium’s promulgation, the advancement of active participationActive participation centered crucially on accessibility and intelligibility of rites and texts. This chapter argues that a vital aspect of active participationActive participation requiring serious attention today is the activation of worshippers’ creative religious imaginationReligious imagination proceeding from attentiveness to the qualitativeQualitative dimension of liturgical acts. Dynamic spaces ought to be facilitated whereby the need to follow an almost-incessant stream of words gives way to being present to the liturgical moment in its qualitativeQualitative fullness and indeterminate complexity for new insights and experiences to emerge. Instrumental music performance can give rise to such a space. Through drawing on, integrating, and applying theories of conceptual blendingConceptual blending and qualitativeQualitative thought to a specific musical-liturgical scenario involving instrumental musicInstrumental music, this chapter demonstrates how musical-liturgical dynamic space is an exemplary medium for cultivating dimensions of active participationActive participation that are imperative to liturgical efficacy.