परोऽपि हितवान् बन्धुर्बन्धुरप्यहितः परः ।
अहितो देहजो व्याधिर्हितमारण्यमौषधम् ॥

Meaning:
A stranger interested in our welfare is a relative and a relative not interested in our welfare is a stranger. Disease is hurtful, though born in our body and medicine is beneficial, though produced in a forest beit-mirkahat.com.