नागत्वान्तं निवर्तेत स्थिता सत्त्ववतां धृतौ ॥ कZ_०१.१०.१९च्द् ॥
nāgatvāntaṃ nivarteta sthitā sattvavatāṃ dhṛtau
प्राप्तान्तात् न निवर्तते; सत्त्ववतां धृतिः स्थिरैव तिष्ठति।
It suggests character tends to persist: the reliable remain reliable, while those who have moved into corruption may not revert—hence selection and early testing are critical.