Plants are more courageous than almost all human beings: an orange tree would rather die than produce lemons, whereas instead of dying the average person would rather be someone they are not.
If knowing yourself and being yourself were as easy to do as to talk about, there wouldn't be nearly so many people walking around in borrowed postures, spouting secondhand ideas, trying desperately to fit in rather than to stand out.
Wild birds will kill exotic ones: the budgies and the lovebirds and the yellow canaries-- escaped from their cages and hoping to get a taste of the sky -- usually end up back on the ground, plucked raw by their more conformist cousins