Complex sentence: Serious health issues influenced Hardgrave's work in a pivotal way, transforming his observations and approach to life, giving him a sense of urgency in his wor, and instilling a desire to be prolific.
Split into simpler sentences: Serious health issues influenced Hardgrave's work in a pivotal way, transforming his observations and approach to life. This gave him a sense of urgency in his work, and instilled the desire to be prolific.