Purpose: The paper aims to rediscover the subtle heart and discuss its importance in relation to conversations regarding sustainability. Design/methodology/approach: Based on the imaginal approach of the author's doctoral research, this paper is informed by the discourse of transpersonal psychology, attempting to open a space through which it becomes possible to perceive the heart differently. Findings: This paper discusses the idea that knowledge as generated through the heart has been rendered subservient to knowledge generated through the mind/brain through a dominant/medical narrative (Bound Alberti, 2012). This means that the heart's wisdom and the heart's benevolent qualities cannot gain traction at the level at which decisions are made in society. Research limitations/implications: While the heart is not unproblematic, and can carry notions of moral superiority, this paper is written as an appeal to create safe enough spaces to bring the heart back into conversation at the level of political discourse. Practical implications: This paper suggests that it is the approach of the heart, the qualities and characteristics that the heart embodies, and the different way of being in the world that the heart makes possible, which could play an important role in guiding us towards a more sustainable world. When taken seriously, the heart offers a way of engaging with, and thinking about, ideas of relationship, wholeness and interconnection -- all of which have been identified as important by numerous scholars in relation to engaging with global challenges (de Witt, 2016). Social implications: This paper suggests that it is the approach of the heart and the different way of being in the world that the heart makes possible, which could play an important role in guiding humanity towards a more sustainable world. Originality/value: Since the late 1900s, scholars have been calling for creative thinking in relation to engaging with the myriad of issues facing our planet, and this paper is written as a response to that call -- creating a platform for the heart to speak and making a case for its importance in conversations relating to sustainability.