"Kindness and truth shall not leave you; bind them upon your neck, inscribe them on the tablet of your heart"-Mishle 3:3
Kindness and truth shall not leave you,not that they are a part of you , they shall not leave they are there , available waiting for you.It further says inscribe them on the tablet of your heart, not in your heart in other words they are basically just decoration until you allow them into your heart and then kindness and truth will not leave you ,but more, they will be a part of you.
When our hearts are closed then we create illusions on the surface of our hearts devoid of lasting impact or meaning because for true positive effect ,achievement success etc we need to feel and that is only possible when we open our hearts and then all those illusions gain entrance and become real.