This quote emphasizes the importance of patience in the journey of self-improvement and personal growth. The journey to becoming a better person is not easy or quick; it is a delicate process that requires time and patience. By referring to self-growth as "tender", the quote suggests that personal development is a fragile, sensitive process that requires nurturing and care. It’s like a seed that needs time, care and the right conditions to grow into a strong, healthy tree.

The phrase "it’s holy ground" signifies that the process of self-growth is sacred and should be respected. It is a personal journey that is unique to each individual and is a space where profound transformation and enlightenment can occur.

The last part of the quote, "There’s no greater investment", suggests that investing in oneself, in one’s personal growth and development, is the most valuable investment one can make. No other investment can yield the same level of satisfaction, fulfillment and overall improvement in quality of life.

Applying this idea in today’s world, especially in the realm of personal development, could mean prioritizing self-improvement and self-care amidst the hustle and bustle of life. It could mean taking time each day to reflect on one’s actions, thoughts, and feelings, and making conscious efforts to improve. It could also mean seeking help and guidance when needed, and not being too hard on oneself when progress seems slow.

In a world that often values speed, efficiency, and instant results, this quote serves as a reminder that personal growth is a slow process that requires patience, care, and respect. It emphasizes that the journey to self-improvement is just as important, if not more so, than the destination.