Meaning
Supreme God Krishna spoke
But renunciation of the world {for contemplating upon God in solitude}, O, Mighty-armed Arjuna, is hard to attain and agonizing without imbibing the essence of {Karma-} Yoga {i.e., without renouncing attachment to the world and worldly affairs}. The Action Yogi {given to selfless and unattached actions dedicated to God} is soon drawn into the Being of God-the-Supreme. (5:6)
Sanskrit
श्रीभगवान् उवाच
सन्न्यासस्तु महाबाहो दुःखमाप्तुमयोगतः ।
योगयुक्तो मुनिर्ब्रह्म नचिरेणाधिगच्छति॥
Word-by-word
सन्न्यासः तु महा-बाहो दुःखम् आप्तुम् अ-योगतः,
योग-युक्तः मुनिः, ब्रह्म न-चिरेण अधि-गच्छति।