Good design is giving good meaning to things.

Onur Cobanli ཡིས་འགྲེལ་བཤད་བརྗོད་པ།
This may seem very obvious to you; but unfortunately, as of this very moment when I am writing this down, there are still too many bad designs, there is still products design with planned obsolescence in mind, there are badly designed products that hurt kids, there are badly designed interfaces that hurt our eyes and there are designs that are purely harmful in their nature; good design is none of these. Good design is about making things better, for humans and the planet where we live; it is about improving habitats, as well as general wellbeing of people. When you design anything, always ask yourself how your design benefits society, the world and your habitat.