Bhagavad Gita - Chapter 2, Verse 14

मात्रास्पर्शास्तु कौन्तेय शीतोष्णसुखदु: खदा: |
आगमापायिनोऽनित्यास्तांस्तितिक्षस्व भारत ||

In this verse, the supreme personality of the godhead, Lord Krishna, shares the knowledge with Arjuna of how our five sensory organs, namely, hearing, seeing, touching, smelling, and tasting, raise happiness and distress moments in our minds. However, the supreme personality of the godhead instructs Arjuna that he should not disturbed by these changes in the mind caused by the senses. Instead, the Arjuna should be steady (in a mode of equilibrium) and continue to perform his duties in Krishna consciousness. This verse explains the changes in the mind caused by sensory organs' perceptions and how one duty should not be affected by changes in the sensory organs' perceptions. For example, during the summer season, when the weather is hot, the householders do not stop cooking meals in the kitchen. Similarly, during the winter season, when the weather is cold, humans do not stop bathing in the early mornings. So, irrespective of the climatic changes, human beings do not stop discharging their duties. Similarly, humans should not be disturbed by the fluctuations in our minds caused by our senses being in contact with the external environment. We should learn to be tolerate happy and distress moments in our mind and continue to discharge our Krishna consciousness duties, meaning we perform tasks as devotional service to the Almighty.