detemination made/showed/displayed

Hi fellow believers

Which word in bold in the following text should be used?

Many thanks.

This time, we have published the memorial photograph collection of our High Priest’s visit as a memento of the ceremony for the first anniversary of the establishment of the Kaimyo-in and the inauguration of the Hokkeko Kaimyo-in Chapter. I shall be very pleased if this book enables you to recall your sense of gratitude to our former High Priest Nikken Shonin and our current High Priest Nichinyo Shonin, and inspires you to maintain your joy and determination that you made/showed/displayed during the Ceremony and Kick-off Meeting.

(Note: Kaimyo-in is the temple. Hokkeko is the title given to the believers.)