“Cintra” is a catalan word for a wooden stand used to hold  an arch in construction; when the last piece is placed and the arch stands by itself  the “cintra” (centering) is removed.

The previous sentence is a metaphor that symbolizes the process that a person suffering from a mental problem goes through, as it usually needs support until able to live autonomously.

It also applies to people who seek personal development through self-awareness and chooses to make this journey with the help of a professional.